Method of and apparatus for manufacturing headed pins



No. 62!,832. Patented Mar. 28, I899. G. W. LEE.

ME'ILHOD OF AND APPARATUS FOR MANUFACTURING HEADED PINS, .&c.

(Application filed Oct. 7, 1898.)

(No Model.)

Wzarweww InWeflZZrP Nrrnn STATES ATENT FFrcE.

GEORGE WV. LEE, OF BINGHAMTON, NEXV YORK.

METHOD OF AND APPARATUS FOR MANUFACTURING HEADED PINS, &c.

SPECIFICATION forming part of Letters Patent No. 621,832, dated March28, 1899.

Application filed October '7, 1898. Serial No. 692,889. (No model.)

' Apparatus for Manufacturing Headed Pins for Screws, Rivets, and theLike, of which the following is a specification.

My invention relates to an improvement in the method of and apparatusfor forming headed pins from blanks of metal, the said pins beingintended for use as rivets, screws, and the like.

One object of my invention is to provide an improvement in the method ofmanufacturing headed pins in which the metal which forms the blank isdisplaced in a direction perpendicular to the face thereof to form a pinto which the surrounding portion of the blank forms the head;

A further object is to provide means for carrying out this method.

A further object is to provide an apparatus for forming headed pins inwhich means are provided for determining the length of the pin and inwhich means are provided for ejecting the headed pin from the machineafter it has been formed from the blank.

A further object is to provide means whereby headed pins may be formedwith heads of much larger diameter, if so desired, than has hithertobeen possible by the well-known method of forming the headed pins fromwire.

In the accompanying drawings, Figure 1 represents a face view of a blankof disk form. Fig. 2 represents an edge view of the same. Fig. 3represents a top plan View of the headed pin. Fig. 4 is a side View ofthe same. Fig. 5 represents a side View of a headed pin with the pinportion threaded to.

form a screw. Fig. 6 is a View, partially in vertical central section,of a press for forming the headed pins, a blank being shown within theseat in the platen of the press and the plunger being represented asbeing raised away therefrom. Fig. 7 is a detail vertical centralsectional viewshowing the plunger depressed and the headed pin formed;and Fig. 8 represents a detail vertical central sectional view with theplunger raised and the sists of a cam D, carried by the yoke andprovided with a suitable handle d.

The platen B extends vertically through the bed-plate A of thepress andmay be removed therefrom when it is desired to replace it by anotherplaten. The platen B is provided with a shallow seat I), which is ofsuch shape and size that it will engage the periphery of the blank E,from which the headed pin is to be formed. The said seat in the presentinstance is of circular form, and the blank is a disk.

The platen B is provided with a screwthreaded socket Z) of considerablediameter, leading from its bottom upwardly a considerable distancetoward its top. .A vertical hole 19 leads downwardly from the center ofthe seat Z) into the screw-threaded socket Z). This hole I) is made ofthe diameter which it is desired to have the pin which is to be formedfrom the blank E.

The plunger 0 consists of an upper section 0 and a lower section 0,having a screwthreaded engagement with the upper section. A lock-nut chas a screw-threaded engagement with the lower portion a of the plungerand serves to lock the said lower portion in any desired adjustment. Thebottom face of the lower portion 0 of the plunger is shaped so as toenter the seat bet the platen B and snugly fit within the walls of theseat, so that when the proper amount of pressure is brought to bear uponthe said plunger a portion of the metal of the blank E within the seatis caused to flow downwardly into the holeb without permitting the blankto extend laterally. The depth of the hole 19 from the seat downwardlymay be adjusted so as to regulate the length of the pin portion of theheaded pin by means of a vertically-disposed rod F. This rod F isprovided with a collar f within the recess 1), and the portion of therod below rod F at all times at the limit of its downward movement. Alock-nut g engages the screwthreaded portion of the plug G and serves tolock the plug in any required adjustment.

After the headed pin has been formed it may be ejected from the platenby the following means: A rock-lever H is pivoted to a bracket h,depending from the bed-plate A of the press, and one arm h of therocking lever is caused to engage the lower portion of the rod F, sothat when the other arm 7L2 of the rocking lever is depressed the lowerportion of the rod F will be forced upwardly through the plug G and theupper portion of the said rod will be forced upwardly through the hole bthereby lifting the headed pin out of the platen.

It is to be understood that the upper end of the rod F may be made ofany desired shape, so as to produce a rounded, pointed, flat, or othershape to the end of the pin portion of the headed pin. It is also to beunderstood that the platens may be provided with seats I) of any desiredshape and size to form different styles of heads for the headed pins andthat the holes 11 leading from the the said hole if the bottom face ofthe plunger 0 were left perfectly plain. To produce'a more finishedlooking top face to the head, I provide the bottom face of the plungerwith a slight teat or projection 0 directly over the hole b IVhile Ihave shown a hand-press in the accompanying drawings, I wish itunderstood that this form of press was simply used as an illustration toshow a means for operating the plunger, it probably being preferable touse a power-press in general practice, because of the greater amount ofpressure which could be obtained by the use of such power-press.

It is evident that slight changes might be resorted to in the form andarrangement of the several parts Without departing from the spirit andscope of my invention. Hence I do not wish to limit myself strictly tothe structure herein set forth; but

hat I claim is 1. The herein-described method of shaping cold metalconsisting in forcing the metal composing the blank to flow inwardly ina direction away from the periphery and thence directing it laterallyaway from the blank, substantially as set forth.

2. Means for eonfininga piece of metal edgewise to prevent itsexpansion, a support for the piece of metal provided with a hole leadingaway from the face of the support and means for exerting pressure uponthe face of the piece of metal and for directing the metal into the holeto form a pin integral with the metal.

In testimony that I claim the foregoing as my invention I have signed myname, in presence of two witnesses, this 27th day of September, 1898.

GEORGE XV. LEE.

Vitnesses: FREDK. HAYNES, O. S. SUNDGREN.

